how to list posts from a specific category

In a sidebar.php or a PHP code widget you could use something like:

<?php
    $args=array(
      'cat' => 5,
      'post_type' => 'post',
      'post_status' => 'publish',
      'posts_per_page' => -1,
      'caller_get_posts'=> 1
      );
    $my_query = null;
    $my_query = new WP_Query($args);
    if( $my_query->have_posts() ) {
      echo 'List of Posts in category 5';
      while ($my_query->have_posts()) : $my_query->the_post(); ?>
      <p><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></p>
       <?php
      endwhile;
    }
wp_reset_query();  // Restore global post data stomped by the_post().
?>

This is great code. Is there a way to limit the listing to the current category and not the sub-cats? It seems to list all posts down the tree.

maybe using filter with in_category() ro something like that?

thanks

Shawm